Gap and segment blank-gumming cylinder.



M. E. PETERS, G. H. FATH & A. F. MILLER.

GAP AND SEGMENT BLANK GUMMING CYLINDER.

APPLICATION FILED FEB.8.1916.

Patented Sept. 11, 1917.

2 SHEETS-SHEEP] M. E. PETERS, G. H. FAIH &/I. F. IVIILLEI'I.

GAP AND SEGMENT BLANK GUMMING CYLINDER.

APPLICATION FILED FEB. 8, I916.

Patented Sept. 11, 1917.

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MELVILLE E. PETERS, GEORGE E. TATE, AND ALBERT F. MILLER, 0E DENVER,COLO- RAIDO, ASSIGNORS To THE PETERS PATENT EIeETs COMPANY, or DENVER,coLo Ano, A CORPORATION or COLORADO.

GAP AND SEGMENT BLANK-GUMMING CYLINDER.

Application filed February 8, 1916.

ping blanks, and alsoof applying a coat of gum to the edges only ofloose box wrapping blanks.

Second, to provide a gapped type of blank gunnning bylinder that isarranged to eX- pose the advancing edge of each blank after it has beencoated wlth gum in order that this exposed edge may be gripped bypickers or any other suitable mechanism and peeled off of the cylinderand be carried forward to further treatment. 7

Third, to provide a gap and segment type of blank gumming cylinder thatis adapted to receive a supply of adhesive gum from any suitable sourceof supply, and to which blanks may be fed by any suitablfi blank feeding-mechanism, and that will gum a large number 01"? blanks per minute, andthat naturally rolls each blank upon itself and against its gummedsurface and holds it so that it can be unrolled from it by any suitablemechanism.

A further object of our invention is to provide a gapped and segmentcylinder that will apply a coat of gum to the one side of blanks or tothe unprinted side of printed labels, that are made ofpaper,silk,.leather, or any other suitable material, and that will leave themin such a manner that their advancing edge may be gripped by somesuitable and operative mechanism and the blank be peeled oit of thegapped cylinder in the naturally curved direction in which it will curlup the instant it is removed from the gapped gumming cylinder.

WVe attain these objects the mechanism Specification of Letters Patent.

Patented Sept. it, 1917..

Serial No. 76,987.

illustrated in the accompanying drawings, in Which:

Figure 1 is a plan view ota blank gumming cylinder having a gap in itsperipheral surface, a hinged segment for normally clos lng said gap, andmeans for operating said segment, together with blank feeding andtransmitting means.

Fig. 2 is a side elevation of the parts shown in Fig. 1.

Fig. 8 is a longitudinal sectional view of a blank gumming cylinderadapted for gumming the entire surface of one side of a blank.

Fig. 4 is an end view of the said cylinder, partly in section, showing ablank thereon, one end of which rests upon the hinged seg ment whichforms a movable port-ion of the peripheral surface of the cylinder, themechanism for rocking said segment being also shown.

Fig. 5 is a similar end view, showing the segment rocked to the oppositelimit of movement from that shown in Fig. 2, there by to release andexpose the end of the blank which rested thereon, so that the same maybe engaged by suitable blank removing grlppers.

Fig. 6 is a side view of a portion of a cylinder adapted for. gummingloose-wrap blanks.

Fig. 7 is an end view thereof, showing the cam-operated lever, whichcarries the blank engaging roller which holds the blank from slippingwhen the segment is moved to expose one end of the blank.

Fig. 8 is a transverse vertical sectional view of the loosewrapcylinder, showing the threaded holes therein for receiving clampholdingscrews by which the blank-edgegumming strips may be secured at pointsupon the cylinder to suit varying sizes of blanks.

Fig. 9 is a plan view'oi a portion of the loose-wrap-gumming cylinder,showing the strip for gumming the edge of the blank opposite that whichis gummed by the seg-, ment.

Fig. 10 is a view of a tight-wrap blank,

the entire surface of which is gummed. And

- chine.

Fig. 11 is a view of a loose-wrap blank showing the gummed surfaces.Sim1lar letters of reference refer to similar parts throughout theseveral views.

' gum to blank sheets of paper or silk or other material, such as areused for wrapping or covering paste board boxes and for other uses. Anysuitable means may also be employed for feeding the blanks tothe'cyl1nders. We preferably however feed them against the under orlower side of the gumming cylinders by a roller, which may be of anysuitable construction.

This cylinder is a hollow cylinder mounted on a shaft 2 that isrotatively mounted in bearings 3 in the side frames of the ma- Thisblank gumming cylinder 1 is provided with a transverse gap or open holeat that extends through its peripheral surface throughout its entirelength. The gap in, this blank gumming cylinder is normally closed by asegment member 5 which corresponds to a segment portion of the cylinderssurface, and at each revolution it is opened at a predetermined pointand draws away from the advancing edge of the blank, which is fed uponthe cylinder to overlap this segment for a short distance along its edgeat which point the free and exposed edge of the blank is caught by aplurality of spring actuated pickers that grab it and feed it forwardonto the blank tempering and discharging mechanism, but which do notform a part of my present invention. The peripheral surface ofthissegment is of the same circumferential curve and radius as the peripheryof the cylinder, and presents when in its place in the gap a smoothunbroken peripheral portion of true cylindrical sure face of thisgumming cylinder, and it normally fills the gap during about the wholeof each revolution of the cylinder. The edge 6 of the gap is the leadingedge as the cylinder rotates, and this edge tapers from a thin edge at aslightly curved angle rearwardly into the cylinder through the thicknessof the shell of the cylinder and to the opposite side of theaxial shaftof the cylinder from this tapering edge 6 we pivotally mount on a shaft7 the segment 5 of the cylinder 1.

The segment '5 comprises a curved strip portion which is preferably ofabout the same thickness as the shell of the cylinder and of thesamelength as the gap in the cylinder. This curved portion of thesegment is provided at its opposite ends with rock arm portions 8 and 9,which are provided with hubs that are mounted on and secured to the endsof the rock shaft 7 that eX- tend through the hubs of the cylinder,which preferably withthe flanges of, the cylinder are arranged at ashort distance inside of theends of the cylinder in order to form arecess in eachend of the cylinder in which the supporting arms of thesegment and its operative mechanism could be housed. The segment ismounted Within the cylinder in such relative relation to the axis of thecylinder that it swings up into and neatly fills the gap in itsperipheral surface, and also swings inwardly into the cylinder behindthe tapered edge 6 of thegap.

Our invention contemplatesthat the gap forming and closing segment ofthe blank gumming cylinder may be moved to open and close thev gap byanysuitable mechanism. We preferably however arrange this feature of ourinvention in the following manner: t I

To the free end of one of the rock arms we secure one end of a link'lO,the oppositeend of which is secured to one end ofa rock arm 11, which ispivotally secured by a bolt'12 to a lug formed on'the adjacentflange ofthe 7 one of the rockarms of the segment, and its free end is .slidablysecured to an eye bolt 17 that is secured to a lug that isformed on theadjacent flange of the cylinder. A'collar 18 is formed on the pin 16against which and between which and the eye bolt the spring 15 bearswith an expansive pressure that'forces the segment into the gap andholds it there against the side edge 6 of the gap until the cam engagesthe roller of the rock arm and moves it and its link 10 to swing thesegment backward and down into the cylinder behind the opposite sideedge of the gap. As

the cylinder rotates it is so timed relative to the feeding movement'ofeach blank that the advancing edge of the blank is moved by a feedroller 19, or by any other suitable means, as this feed roller does notform any part'ofmy present invention, against and onto the surface ofthe segment and within about a quarter of an inch to a half ofan inch ofthe advancing edge 60f the gap of the cylinder, in which position itremains until the cylinder rotates a part of its full revolution. Thenwhen the segment has arrived in operative relation to the pickers it isinstantly thrown back into the cylinder out of the gap by its lever andcam mechanism, which leaves the advancing edge of the blank hanging overthe edge of the gap in the clear space of the gap, and this exposed andfree edge of the blank is instantly caught by the pickers and is peeledoff by them from the gumming cylinder onto the cylinder 20, from whichit is carried to further treatment.

In 3, l and 5 we illustrate a modification of the movable segment ofthis blank gimiming cylindeiz. In this modification the segment 21 is apartial gap filling segment and'is made to normally stand against theedge 22 of the gap, and the feed movement of the advancing edge of theblank is so timed relatively to the rotative speed of the gummingcylinder that the advance edge of the blank will be fed onto a part ofthe width of the segment from the blank feeding roller 19, and then whenthe cylinder has carried the advance edge of the blank into the path ofthe pickers, the segment is moved away from the edge 22 ofthe gap to theopposite edge 23 of the gap, which movement of the segment leaves theadvancing edge of the blank exposed in the clear space of the gap andhanging over its edge, where it is instantly caught by the pickers andpeeled off from the gumming cylinder, and is fed to further treatment. 7

The segment in this modification of the blank gumming cylinder isprovided with hub portions 2d that are mounted directly on the cylinderssupporting shaft 25 around which a coiled spring 26 is placed, one endof which is secured to a collar 27 on the shaft and its opposite end issecured to the adjacent arm portion of the segment. This spring isarranged to hold the segment with a constant resilient pressure upagainst the edge 22 of the aperture in the'gulnming cylinder. The gapaperture in the cylinder of this modification is made enough wider thanthe width of the segment to allow the segment to move far enough awayfrom the edge of the blank that laps over onto its peripheral surfa e toallow the freed and loose edge of the blank to be engaged by thegrippers 28, which will peelit off of the gmnming cylinder ontothetempering and discharging mechanism. i

This modified form of gap gumming cylinder is preferablyxmade with endflanges that are even with the end of its length, and through one ofthem an oblong aperture 29 is formed, through which a stud '30 is (BX--tended from the outside of the adjacent end, and is secured to the armof the segment at one end, the opposite endof whieh'is piv- 7 theadjacent side frame, by any suitable means. Then as the cylinder rotateswhen the gap registers in proper relative position to the pickers, theroller 33 engages the cam and moves the rock arm and its link and thesegment against the tension of its spring 26 and forces the blankoverlapping edge of the segment from under the blank and away from theside edge of the gap, thus leaving the edge of the blank free and in thepath of thepickers, which with either segment and cylinder in use flyunder resilient pressure over and under the free edge of the blank andpress it and hold it firmly under a constant resilient tension againstthe gripper barsof the intermittently moving conveyer,

as will be presently described.

, We preferably use the gap closing segment for some classes of work, asthe segment which normally fully fills the gap prevents gum working intothe interior of the cylinder, while in the open gap. modification gumwill work slowly into the cvlinder and necessitate the taking of thecylinder out of the machine and cleaning out its inside once in a while.i

The construction above described of the blank gumming cylinder, hasdescribed the construction we employ for coating or covering the entiresurface of one side of a blank A with gum, glue or other adhesive, as ishown in Fig. 10 the gummed surface being indicated by the entiresurface of the blank being shaded.

In preparing blanks to be used for covering boxes in a manner known asloosewrapped work, the blanks, instead of being entirely covered on oneside with the adhesive substance, are gummed only on a narrow margin ofboth of their sides and end edges, such gummed blanks being adapted toextend inside of the box and are folded down on the inner surface of abox adjacent to its upper edge.

In Fig. 11 of the drawing we have illustrated a blank with the gummededges shaded on the edges necessary for loosewrapping purposes, thesegummed edges are indicated by the shading along the side and end edgesonly of the blank B, shown in Fig. 11', and in Figs. 6 to 9 inclusive,where we have illustrated the construction of a blank gumming cylinderespecially designed to gumblanks for this character of box cov eringwork. The circumferential surface and shell of the cylinder 36 isperforated with apertures 37 which are threaded as shown, and in theseperforations screw driver screws are threaded, for the purpose ofadjustably retaining narrow strips 38 and 39 of any suitable material,preferably strips of metal. The strip 38 extends in the direction of theaxis of the cylinder and is adj ustably held in place by means ofclamping dogs 40 arranged on opposite sides of it and held in place byscrews 41, which are passed through slots formed in the dogs. The edgesof the dogs adjacent the said strip are beveled to conform to thebeveled edges of the strips. The strip 38 is adapted to apply theadhesive gum to the narrow rear end edge 42 of the blank (see Fig. 8).It is essential that this strip 38 should be adjustable in order that itmay be properly arranged to conform to the requirements of blanks ofdiffer.- ent sizes.

Ior gumming the area 43 on the advancing edge of the blank, the outercylindrical curved surface of the segment bar 21 is utilized, this outerextremity being radially extended beyond the normal peripheral surfaceof the cylinder, to and even with the gumming exterior surface of thestrips 38 and39. V

In order to gum the surfaces 44 at the opposite sides of the blank thestrips 39 are properly positioned, being curved circumferentially toconform to the curvature of the outer face of the cylinder. These stripsare also held in place by adjustable dogs 45, whichare secured to thecylinder by screws which after passing loosely through slots in the dogsthread into the cylinder. These strips 39 are consequently adjustable inorder that their positions may bevaried to suit the size of blanks beinggummed, for loose wrap work.

In order to hold the blank in its proper position upon the cylinderagainst accidental creeping movement while changing the po sition of thesegment bar to free and expose the gummed advancing edge of the blank,we apply to the central portion of the cylinder along the edge of thegap that is normally engaged by the segment. a raised strip 46, whichhowever is of less height than the gumming strips 38 and 39, as it doesnot receive any gum on its surface, and we apply a resilient pressure tothe blank when it rests on the surface of' this strip that holds itagainst displacement when the segment moves away from the advancing edgeof the blank under the influence of'the crank levers 31 and 32 and thecam 35. This resilient pressure is applied to the blank onthe surface ofthe strip 46, as follows:

, A rock shaft 47 is journaled in the frame work of the machine as shownin'Fig. 6,

and intermediate between the ends of this shaft, a crank arm 48 is madefast, the outer end of which carries a roller 49. A coiled spring 50surrounds the shaft, having'one extremity secured to the frame as shownat 51 and its opposite end connected to an adjustable collar 52, whichis held in place on the rock shaft by a set'screw 53. This spring actsto throw the roller 49 against the surface of the strip 46 while a rockarm and cam mechanism normally hold the roller away and above this stripand also above and out of contact with the gumming strip 38 and segment54, so that this roller does not touch anything except the ungummedsurface of theblank and the stri 46. This rock arm and cam that hold theroller away from the cylinder are arranged as follows: One extremity ofthe shaft 47 beyond the frame is equipped with a crank arm 55, its outerextremity carrying a roller 56 lying in the path of a cam recess 57,formed in a disk 58 that is secured on the shaft 25 of the gummingcylinder at'the side of its driving gear59.

In gumming blanks for loose wrap work, in addition to gumming the edgeportions of blanksas shown and described, it materially assists inwrappingfthe blanks in the corners of boxes especially when some kindsandcharacters of paper are used for the blanks, if a small additionalarea of surface'60 is gummed atthe four corners of the blank as shown inthe view of the loose wrap blank B, shown in Fig. 11, and while we maynot always care to gum these corners, yet it will sometimes be anadvantage to do so, and we consequently have pro vided the loose wrapwith the necessary strips 61 to distribute a coat of gum on the blank atthese corners. These strips are similar in height to those thatdistribute the gum to the edge portions of the loose wrap blanks, andthey are made of a size in length and width to gum as much or as littleof these four corners 60 overand in addition to the regular width of thegummed marginal edge as is desired. and they are secured on the surfaceof the cylinderby dogs and screws the same as the other strips. A pairof these additional corner gumming strips 61- is positioned on thecylinder even with the advancing edge 62 of the gap 63, and consequentlyeven with the edge of the segment'that normally bears againstftheadvancing edge of the gap, asthe cylinder rotates,- and another pair ofthese corner gumming strips islocated in a position on the cylinder togum the opposite end corners of the size blanks being run through themachine, and both of these sets of strips a would be placed directlyclose up to the segment and the strip38 so as to distribute gum I whollyover the corners ofthe blank without leaving an ungummed space betweenthe strips 38 and 61. The-opposite edges of the blank are preferablygummed only along their central portions, their corners being preferablyleft blank, as shown in the view Fig. 11 of the loose wrap blank B.

When the time comes to move the surface of the segment 1 from under the'umnied edge of the blank, the cam 58 suddenly releases the crank arm 55which permits the roller 56 to drop into the recess 57 in the cam 58 andwhich drop or release movement of the rock arm permits the spring 50 tothrow the roller is with resilient pressure against and hold it againstthe blank and the surface of the ungummed strip at, which action of theroller grips the blank to the ungummed surface of this strip 46 as itrolls over it, due to the rotative movement of the gumming cylinder,which rotates in the direction of the arrow, while at the same time thesegment draws away from the gummed edge of the blank faster than thecylinder rotates and thus leaves the advancing edge of the blank in thegap, where it is instantly gripped by the blank gripping finger pickersof the conveyer the same as the blanks are that are gummed all over bythe gumming cylinder 1, which gums the whole surface of one side ofblanks which are to be used for tight-wrap box covering work, while thisloose-wrap blank gumming cylinder gums only the edge portions of oneside of the blanks.

The operation of our blank gumming gapped cylinder is as follows:

As before stated, the blanks may be fed to the cylinder by any suitablemechanism. hen each blank reaches the horizontal central portion of thegumming cylinder, it opens its peripheral segment and exposes theadvancing edge of the blank, which is instantly seized or gripped by thefinger pickers, which when released by the cam fly into the gap andclamp the exposed edge of the blank to the adjacent cross-bar, as theytravel around the transmission cylinder at the same speed as the gummingcylinder, and the blank is transferred by them, and the transmissioncylinder 20, to mechanism that carries the blank to further treatmentand is arranged to manipulate the pickers to release the blank whereverdesired.

Our invention provides a practical blank gumming cylinder that may beused in gumming machines of various types and constructions. Anillustration of its application to a gumming machine may be found in ourpending application Serial Number 30471 filed May 25th, 1915, for a newpneumatically controlled and automatically operating blank gumming andtempering machine; and while we have illustrated and described thepreferred construction of our gumming cylinders we do not wish to belimited to the construction shown, as many changes might be made withoutdeparting from the spirit of our invention.

Having described our invention, what we claim as new and desire tosecure by Letters Patent, is:

1. A gapped cylinder, means including a segment for closing the gap,means for feeding a blank onto said cylinder to lap onto said se ment,and means for moving the segment from under the edge of the blank.

QJA gapped cylinder having a segment movable in said gap to receive andexpose a blank, and means including a transmission mechanism forgripping the exposed edges of said blanks and for conveying them to abox covering machine. a

3. In a blank gumming cylinder, a gumming cylinder having a gap and anopening and closing cylindrical segment fitting said gap and arranged toreceive and to expose the advancing edge of each blank at predeterminedpoints on said gumming cylinder as it rotates, means for feeding blanksto said cylinder, and means for grabbing their advancing exposed edgesand removing them from said gumming cylinder, in the direction in whichthey would naturally curl.

l. In a blank gumming cylinder, a gum di tributing cylinder providedwith a gap and having a segment member forming a part of the gummingface of said gapped cylinder, said segment being positioned to receivethe advancing edge of the blank and movable at a predetermined point insaid cylinders rotative movement to expose the gummed edge of saidblank, means for feeding blanks onto said gumming cylinder and itssegment, and means for operating said segment to close and open saidsegment to receive and to expose said blank.

5. In a box-covering blank gumming cylinder, a rotating cylinderoperatively connected to blank feeding, gumming, gripping, transmissionand conveying mechanism, and provided with a reciprocable and movablesegment surface portion of said cylinders circumference, and arranged toform a gap in the surface of said cylinder when moved away therefrom,means for feeding the blanks one at a time so that the advancing edge ofthe blank will engage the movable segment surface portion of saidcylinder at the time it is being gummed, and will be exposed in the gapformed therein when the segment portion is moved out of engagement withsaid gaps, means including an expansive tension spring bearing directlyagainst the back of said segment for normally holding said segment inits gap. in said cylinder surface, and a cam mechanism connected tosaidsegment and arranged to instantly open said segment against thetension of said spring and instantlyrelease it to the segment closingexpansive tension of said spring, and means for instantly gripping thegummed edge of said blank in the gap of said cylinder and for removingsaid gummed blank from said cylinder and transmitting it to the saidconveyer.

6. Inv blank gumming gap and segment cylinders, means for revolving ablank gumming cylinder or drum at a constant speed, means for feeding ablank to said cylinder MELVILLE E. PETERS. GEORGEH. FATH. ALBERT F.MILLER lVitnesses g G. SARGENT ELLIOTT, ELIZABETH SMITH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G. p

